A template for converting a uint64_t giving a duration in terms of T1 into a duration expressed as a T2.

time_literals.cpp

/**
 * A template for converting a uint64_t giving a duration in terms of T1 into
 * a duration expressed as a T2.
 *
 * For example, MkTime<std::chrono::seconds> takes in a uint64_t of seconds
 * and returns a std::chrono::microseconds.
 */
template <typename T1, typename T2 = std::chrono::microseconds>
T2 MkTime(uint64_t raw_time)
{
        return std::chrono::duration_cast<T2>(T1(raw_time));
}

typedef std::map<std::string,
                 std::function<std::chrono::microseconds(uint64_t)>>
                TimeSuffixMap;

/**
 * Mapping from unit suffixes for seek command times to functions converting
 * time integers to the appropriate duration in microseconds.
 */
static const TimeSuffixMap time_suffixes = {
                {"s", MkTime<std::chrono::seconds>},
                {"sec", MkTime<std::chrono::seconds>},
                {"secs", MkTime<std::chrono::seconds>},
                {"m", MkTime<std::chrono::minutes>},
                {"min", MkTime<std::chrono::minutes>},
                {"mins", MkTime<std::chrono::minutes>},
                {"h", MkTime<std::chrono::hours>},
                {"hour", MkTime<std::chrono::hours>},
                {"hours", MkTime<std::chrono::hours>},
                // Default when there is no unit
                {"", MkTime<std::chrono::microseconds>}};